DOUBLE INSULATED TOOLS: TOOLS WITH TWO PRONG PLUGS
1.Tools marked “Double Insulated” do not require grounding. They have a special double insulation system which satisfies OSHA requirements and complies with the applicable standards of Underwriters Laboratories, Inc., the Canadian Standard Association, and the National Electrical Code. (See Figure B.)
2.Double insulated tools may be used in either of the 120 volt outlets shown in the following illustration. (See Figure B.)
FIGURE B
EXTENSION CORDS
1.Grounded tools require a three wire extension cord. Double Insulated tools can use either a two or three wire extension cord.
2.As the distance from the supply outlet increases, you must use a heavier gauge extension cord. Using extension cords with inadequately sized wire causes a serious drop in voltage, resulting in loss of power and possible tool damage.
(See Figure C, below.)
3.The smaller the gauge number of the wire, the greater the capacity of the cord. For example, a 14 gauge cord can carry a higher current than a 16 gauge cord.
(See Figure C.)
4.If using more than one extension cord to make up the total length, make sure each cord contains at least the minimum wire size required. (See Figure C.)
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